You Must Love Me: Madonna serenades boyfriend A-Rod as he adoringly watches her perform in concert

Madonna's rumoured new boyfriend Alex Rodriguez was seated in the front row of the superstar's concert last night as rumours about the pair's relationship continued to grow.

The Material Girl, who divorced husband Guy Ritchie last week, serenaded the New York Yankee baseball star at the Miami, Florida leg of her Sticky & Sweet World Tour.

The 50-year-old singer looked directly at Rodriguez as she sang the ballad You Must Love Me, the Oscar-winning song written especially for her 1996 film version of Evita.

Rodriguez, known as A-Rod by fans, smiled adoringly at the singer as she strutted her stuff on stage at the Dolphin Stadium.

He was seated beside Madonna's manager Guy Oseary and Rod Stewart.

At one point, a hot Madonna leaned forward and accepted a bottle of water from A-Rod.

A fellow concertgoer told U.S. TV channel E! News: 'It was easy for him to hand it off because he was sitting in the front row.

'He was all excited watching her perform.'

Before a performance of her song I'm So Far Away, she told the audience: ''I'm sure you can relate about a long-distance love affair.'

Madonna's gig last night started two hours late and the singer irked some fans when she declined to apologise or even wish them 'Happy Thanksgiving'.

His attendance at the concert came on Thanksgiving Eve, an important night for U.S. citizens, fuelling speculation about the seriousness of Madonna and Rodriguez's relationship.

The sportsman, 33, will spend Thanksgiving in Miami today with his ex-wife Cynthia and their two young daughters Natasha, four, and Ella, 19 months, while Madonna is expected to return to New York City to spend the day with her daughter Lourdes.

Madonna's two sons Rocco and David are currently in London with their father Ritchie.

Rodriguez was pictured spending Tuesday with Cynthia, who he divorced in September after six years of marriage.

The family dined at Houston's Restaurant and the manager said the ex-couple appeared to get on well, despite their acrimonious divorce.

The restaurant manager said: 'He was kissing his daughters and seemed in a great mood. You would never know there was any issue at all between him and Cynthia.'

Cynthia filed for divorce from A-Rod in July, accusing her husband of 'emotionally abandonment'.

The couple's split was made public just days after Rodriguez was romantically linked in the press to the singer.

At the time, Madonna released a statement saying: 'My husband and I are not planning on getting a divorce.
'I know Alex Rodriguez through Guy Oseary, who manages both of us. I brought my kids to a Yankee game. I am not romantically involved in any way with Alex Rodriguez. I have nothing to do with the state of his marriage or what spiritual path he may choose to study.'

The first stage of Madonna and Ritchie's divorce was finalised last Friday morning at the London High Court before District Judge Reid, with the decree nisi granted a month after the couple confirmed tabloid reports by announcing their split after eight years of marriage.

The singer's recent divorce from Ritchie has fuelled speculation Madonna and Rodriguez will go public as a couple.

Although details of Madonna and Ritchie's settlement will remain private, the Mail recently revealed that Ritchie would be getting a lump sum of just £2million of Madonna's £300million fortune.

It has also emerged he will keep the £3million Punchbowl pub in London's Mayfair and the couple's £7 million Wiltshire estate and will receive a further payment to buy a large London home.

The Mail has also learned that Ritchie has been given a gift of some £4million of artwork in the divorce.

Madonna has now relocated to New York, where she will live with 12-year-old daughter Lourdes, from an earlier relationship with Carlos Leon.

The couple's sons - Rocco, eight, and David, three - will split their time between New York and their father's homes in England.

Speaking for the first time about the break-up this week, Madonna said she was 'grateful' to be immersed in her tour, which keeps her mind off her high-profile marriage collapse.